Protective enclosure



FIG. 1 is a perspective view of a protective enclosure, showing the new design.

FIG. 2 is a side view thereof.

FIG. 3 is an opposite side view thereof.

FIG. 4 is a top view thereof.

FIG. 5 is a bottom view thereof.

FIG. 6 is a front view thereof; and,

FIG. 7 is a back view thereof.

The broken lines depict portions of the protective enclosure which form no part of the claimed design. 

I claim the ornamental design for a protective enclosure, as shown and described. 